I am specifically asking about Outlook Web Access (browser based Outlook), and not for any other email service or program.
Within Outlook Web Access, is there a way to tell whether or not an email was spoofed? For example, if I receive an email from "email@example.com", how can I be sure that the email is from "company.com" and not spoofed?
There is an option in Outlook to direct all messages from outside the organization to the junk folder, but I found that this feature is not reliable. Spoofed messages still get through.